M4E1 Lower Receiver Features:
- Threaded Bolt Catch Roll Pin – Allows for simple installation of thebolt catch and virtually eliminates the chance to damage the finishduring installation (pin included).
- Integrated Trigger Guard – Eliminates the possibility of breakingthe trigger guard tabs by integrating the trigger guard into the lower,creating a stronger more rigid platform to build upon.
- Upper Tension Screw – Allows users to fine tune the fit of the upperand lower receiver using a nylon tipped tensioning set screw insertedin the grip tang of the lower receiver. This provides a tight fit withany standard AR15 upper receiver.
- Threaded Takedown Pin Detent Recess – Allows user to easily installthe Takedown Pin detent and spring with the use of a 4-40 set screw (nomore launching detents across the room).
- Increased Magwell Flare – Increased the flare of the magwell to aid in quick and efficient magazine changes.
M4E1 Threaded Upper Receiver Features:
- New enhanced forging that gives the upper receiver a “billet look”
- New picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
- M4 Feedramps
- .250 takedown pin holes
- Laser engraved T-marks
